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Technical Data Sheet
PartsTable / COMPONENT / 951619-1PH
951619-1PH ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416 OVERALL, nut_style: ROUND, nut_diameter: 4.125 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 2.562 INCHES NOMINAL IN, thread_series: UN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-582-2266, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
951619-1PH
NSN: 5310-00-582-2266
FSC: 5310
CAGE: 93232 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS WRIGHT ENGINEERED PUMP DIVISION USE CAGE CODE 0UBG9 FOR CATALOGING (USA)
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
nut_styleROUND
nut_diameter4.125 INCHES NOMINAL IN
thread_class2B
nut_thickness2.562 INCHES NOMINAL IN
thread_seriesUN
hardness_rating264.0 BRINELL STANDARD MINIMUM AND 319.0 BRINELL STANDARD MAXIMUM
special_featuresWITH TWO GROOVES 1/4 @IN. WIDE,1/16 IN. DEEP,BY 13/16 IN. LONG,180 DEG APART. W/TWO HEX SOCKET SET SCREWS 3/8-16X7/16 IN. LONG IN
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES NOMINAL NUT
drive_point_depth0.388 INCHES NOMINAL IN
nominal_thread_size3.250 INCHES IN
NSN5310-00-582-2266
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 951619-1PH · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL THREAD SIZE: 3.250 INCHES IN
•
DRIVE POINT QUANTITY: 2
•
THREAD SERIES: UN
•
THREAD PITCH DIAMETERS: +3.1959 TO 3.2041 INCHES IN
•
NUT STYLE: ROUND
•
HARDNESS RATING: 264.0 BRINELL STANDARD MINIMUM AND 319.0 BRINELL STANDARD MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE3.250 INCHES IN
DRIVE POINT QUANTITY2
THREAD SERIESUN
SPECIAL FEATURESWITH TWO GROOVES 1/4 @IN. WIDE,1/16 IN. DEEP,BY 13/16 IN. LONG,180 DEG APART. W/TWO HEX SOCKET SET SCREWS 3/8-16X7/16 IN. LONG IN
THREAD PITCH DIAMETERS+3.1959 TO 3.2041 INCHES IN
NUT STYLEROUND
HARDNESS RATING264.0 BRINELL STANDARD MINIMUM AND 319.0 BRINELL STANDARD MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
DRILLED HOLE DIAMETER0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
951619PHInterchangeable
interchangeable cross-reference
interchangeable
10284Interchangeable
interchangeable cross-reference
interchangeable
RY-151619Interchangeable
interchangeable cross-reference
interchangeable
951619-01Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 951619-1PH?
951619-1PH is a NUT,PLAIN,ROUND.
What parts can replace 951619-1PH?
There are 4 known substitutes for 951619-1PH: 951619PH, 10284, RY-151619 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 951619-1PH?
951619-1PH is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-582-2266. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026